Table 1.

Demographic characteristics of participating students

	Video	%	Text/pictures	%	P-value
Primary test and questionnaire
n	30		30
Mean age (SD)	24.7 (1.3)		24.6 (1.2)		0.75
Sex
Male	13	43	14	47	0.83
Female	17	57	16	53
Follow-up test
n=106	22		21
Mean age (SD)	24.7 (1.4)		24.6 (1.6)		0.94
Sex
Male	8	36	10	48	0.54
Female	14	64	11	52

Note: P-values are for differences between the two randomized groups.

Abbreviation: SD, standard deviation.